Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
Voluntary is regular. It follows the -ies Conversion rule.
Use plural verbs: "The voluntaries are ready" (not "is ready").
Yes. The plural voluntaries is standard across all English variants.
The word voluntary follows the standard English pluralization rule. When forming the plural, voluntary becomes voluntaries. This follows the -ies Conversion pattern, which is one of the most common plural rules in English.
Understanding why voluntary becomes voluntaries helps with spelling and pronunciation. Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
When using voluntaries in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The voluntaries are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.